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| www.fairchildsemi.com LCD Back Light Inverter Drive IC Features * * * * * * * * * * * * * * High Efficiency Single Stage Power Conversion Wide Input Voltage Range 6V to 25V Back Light Lamp Ballast and Soft Dimming Few External Components Precision Voltage Reference Trimmed to 2% Soft Start PWM and PFM Control Analog, Burst and Mixed Dimming Function Allows All N-Channel MOSFET Drive Double Pulse Suppression Logic Open Lamp Detection Output Short Circuit Protection Open Lamp Regulation 20 Pin SSOP FAN7300 Description The FAN7300 provides all the control functions for a series parallel resonant converter and also contains a pulse width modulation (PWM) controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 100kHz depending on the CCFL and the transformer's characteristics. 20-SSOP Rev. 1.0.0 (c)2003 Fairchild Semiconductor Corporation FAN7300 Internal Block Diagram VZ 3V V3 Vz 8V UVLO Internal Bias 1.5Vref COMP6 SCP + ENA 5.4V R S Q 2uA COMP7 + OLP 3.7V 3V Vm2 VS + Vz 1.5V Multiplier Gain K 8uA S_S Va EA_IN + + Clock E/A Controller EA_OUT Main Control Oscillator Rt OLR COMP3 + 3V COMP2 Va min. 0.25V min. 0.25V - COMP1 R Q Q High side gate driver CPUMP Vmo Error Amp. + Vm1 Buffer S max. 1.75V Current Generator max. 1.75V Vb COMP4 + DIM 2 + Analog Burst Mixed COMP5 - Dimming control and Mode Selection 1.5V DIM_MODE 1.5V 3V Vz Low side gate driver + V3 Vcc + 3.7V OUT_H OUT_L GND Ct BCt 50K 50K FAN7300 Pin Assignments DIM_MODE EA_OUT CPUMP V3 DIM EA_IN SCP OLR VZ 20 19 18 17 16 15 14 13 12 11 FAN7300 1 OLP 2 Rt 3 Ct 4 BCt 5 S_S 6 ENA 7 VS 8 VCC 9 GND 10 OUT_L Pin Definitions No 1 2 3 4 5 6 7 8 9 10 Name OLP Rt Ct BCt S_S ENA VS VCC GND OUT_L Function Description Open Lamp Protection Timing Resistor Timing Capacitor Burst Dimming Timing Capacitor Soft Start Enable Input Voltage Sensing Supply Voltage Ground Low Side Gate Drive Output No 11 12 13 14 15 16 17 18 19 20 Name OUT_H CPUMP VZ OLR SCP EA_IN EA_OUT DIM DIM_MODE V3 Function Description High Side Gate Drive Output Charge Pump Zener Voltage Open Lamp Regulation Short Circuit Protection Error Amplifier Input Error Amplifier Output Dimming Input Dimming Mode Selection 3V Reference Voltage OUT_H 3 FAN7300 Absolute Maximum Ratings Vcc=10V, for typical values Ta=25C, for min/max values Ta is the operating ambient temperature range with -25C Ta 85C and 6V Vcc 25V, unless otherwise specified. Characteristics Supply Voltage Operating Temperature Range Storage Temperature Range Thermal Resistance Junction-Air (Note1,2) Power Dissipation Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Symbol VCC Topr Tstg RJA Pd Value 6 ~ 25 -25 ~ 85 -65 ~ 150 112 1.1 Unit V C C C/W W 4 FAN7300 Electrical Characteristics Vcc=10V, for typical values Ta=25C, for min/max values Ta is the operating ambient temperature range with -25C Ta 85C and 6V Vcc 25V, unless otherwise specified. Characteristics REFERENCE SECTION Reference Voltage Line Regulation 3V Regulation Voltage OSCILLATOR SECTION(MAIN) Oscillation Frequency CT High Voltage CT Low Voltage OSCILLATOR SECTION(BURST) Oscillation Frequency BCT High Voltage BCT Low Voltage ERROR AMP SECTION Feedback Output High Voltage Output Sink Current Output Source Current Feedback High Voltage On Burst Dimming MULTIPLIER SECTION Multiplier Input Voltage High Multiplier Gain SOFT START SECTION Soft Start Current Soft Start Clamping Voltage PROTECTION SECTION Open Lamp Protection Voltage Short Circuit Protection Voltage Open Lamp Regulation Vpr Vsc Vor 2.5 2.5 2.5 3 3 3 3.5 3.5 3.5 V V V ISS Vssh S_S=2V 5 3 8.3 3.7 11.6 4.4 uA V Vmih K 1.4 1.6 0.85 1.8 V 1/V Veh lsin lsur Vfbh EA_IN = 0V EA_OUT = 2.2V EA_OUT = 2.2V R(EA_IN) = 50k 3.2 1 3.7 4.2 -1 Va+0.7 V mA mA V fosc Vbcth Vbct1 Ctb = 180nF 125 170 1.75 0.25 205 Hz V V fosc Vcth Vbct1 Ct = 330pF, Rt = 14k 75 95 1.75 0.25 115 kHz V V Vref Vref V3 8 VCC 20V 1.46 2.86 1.5 2 2.96 1.54 25 3.06 V mV V Symbol Test Condition Min. Typ. Max. Unit Va+0.1 Va+0.4 5 FAN7300 Electrical Characteristics (Continued) Vcc=10V, for typical values Ta=25C, for min/max values Ta is the operating ambient temperature range with -25C Ta 85C and 6V Vcc 25V, unless otherwise specified. Characteristics DIMMING SECTION Vaal Analog Dimming Range Vaah Vba Vbbl Burst Dimming Range Vbbh Vab Vaml Mixed Dimming Range Vamh Vbml Vbmh Analog Dimming Select Voltage Burst Dimming Select Voltage Mixed Dimming Select Voltage Start Threshold Voltage Start Up Current Operating Supply Current Stand-by Current ON/OFF SECTION On State Input Voltage OUTPUT SECTION Output High Voltage Output Low Voltage Output Voltage With UVLO Activated Output High Clamping Voltage Rising Time Falling Time Voh Vol Vuv Vohc Tr Tf VCC = 7V VCC = 7V VCC = 4.5V VCC = 20V VCC = 7V VCC = 7V 5 11 13.5 100 50 0.2 0.9 16 200 200 V V V V ns ns Von 0.7 V Vsa Vsb Vsm Vth Ist Iop Isb VCC = 4.5V VCC = 10V VCC = 12V Dim_Mode > 2V, Dim = 0 Dim_Mode > 2V, Dim = 3V Dim_Mode > 2V Dim_Mode < 1V, Dim = 0 Dim_Mode < 1V, Dim = 3V Dim_Mode < 1V Dim_Mode = 1.5V, Dim = 0 Dim_Mode = 1.5V, Dim = 3V Dim_Mode = 1.5V, Dim = 0 Dim_Mode = 1.5V, Dim = 3V -0.5 2.5 -0.5 2.1 2.45 1.2 2.5 -0.5 2.5 1.5 0.7 1.3 4.8 0 3 3 0 2.5 2.85 1.4 3 0 3 2 1 1.5 5.4 150 8.5 80 0.5 3.5 0.5 2.9 3.25 1.6 3.5 0.5 3.5 2.5 1.3 1.7 6.0 250 11 150 V V V V V V V V V V V V V V uA mA uA Symbol Test Condition Min. Typ. Max. Unit UNDER VOLTAGE LOCK OUT SECTION 6 FAN7300 Typical Performance Characteristics Supply Current vs Supply Voltage 12 5.6 Startup Voltage 9 5.4 ICC [mA] Vth [V] 6 5.2 3 5.0 0 0 5 10 15 20 25 4.8 -40 -20 0 20 40 60 80 100 120 140 VCC [V] Temp TEMP [? ] [C] Figure 1. Supply Current vs. Supply Voltage Start Up Current 80 Figure 2. Start up Voltage 3V Reference Voltage 3.00 2.98 60 2.96 Ist [uA] 40 V3 [V] 2.94 20 2.92 0 -40 -20 0 20 40 60 80 100 120 140 2.90 -40 -20 0 20 40 60 80 100 120 140 Temp [C] ] TEMP [? Temp [? ] TEMP [C] Figure 3. Start up Current Operating Supply Current 12 120 Figure 4. 3V Reference Voltge Standby Current 10 100 8 80 Iop [mA] 6 Isb [uA] -20 0 20 40 60 80 100 120 140 60 4 40 2 20 0 -40 0 -40 -20 0 20 40 60 80 100 120 140 Temp [C] ] TEMP [? Temp ] TEMP [? [C] Figure 5. Operating Supply Current Figure 6. Stand by Current 7 FAN7300 Typical Performance Characteristics (Continued) On State Input Voltage 2.0 1.8 9 1.6 1.4 8 10 Soft Start Current Von [V] 1.2 1.0 0.8 0.6 -40 -20 0 20 40 60 80 100 120 140 Iss [uA] 7 6 5 -40 -20 0 20 40 60 80 100 120 140 Temp [C] ] TEMP [? Temp [C] TEMP [? ] Figure 7. On State Input Voltage Ocillastion Frequency (main) 200 110 180 Figure 8. Soft Start Current Oscillator Frequency (Burst) Fbosc [Khz] 100 160 Fosc [Khz] 90 140 120 80 100 -40 -40 -20 0 20 40 60 80 100 120 140 -20 0 20 40 60 80 100 120 140 Temp [C] TEMP [? ] Temp [C] ] TEMP [? Figure 9. Ocillastion Frequency (main) Output High Voltage 7.0 0.20 Figure 10. Ocillastion Frequency (Burst) Output Low Voltage 6.5 0.15 Voh [V] Vol [V] 6.0 0.10 5.5 0.05 5.0 -40 -20 0 20 40 60 80 100 120 140 0.00 -40 -20 0 20 40 60 80 100 120 140 Temp [C] TEMP [? ] Temp [C] ] TEMP [? Figure 11. Output High Voltage Figure 12. Output Low Voltage 8 FAN7300 Typical Performance Characteristics (Continued) Output High Clamping Voltage 15.0 0.7 Output Voltage with UVLO Activated 14.5 0.6 0.5 14.0 Vohc [V] 0.4 13.5 Vuv [V] 0.3 13.0 0.2 12.5 0.1 12.0 -40 -20 0 20 40 60 80 100 120 140 0.0 -40 -20 0 20 40 60 80 100 120 140 Temp [C] TEMP [? ] Temp [C] ] TEMP [? Figure 13. Output High Clamping Voltage Open Lamp Protection Voltage Figure 14. Output Voltage With UVLO Activated Short Circuit Protection Voltage 3.4 3.4 3.2 3.2 Vsc [V] Vpr [V] 3.0 3.0 2.8 2.8 2.6 2.6 -40 -20 0 20 40 60 80 100 120 140 -40 -20 0 20 40 60 80 100 120 140 Temp [C] TEMP [? ] Temp [C]] TEMP [? Figure 15. Open Lamp Protection Voltage Open Lamp Regulation Voltage 3.50 4.4 Figure 16. Short Circuit Protection Voltage Error Amp. Output High Voltage 4.2 3.25 4.0 3.00 Veh [V] 3.8 Vor [V] 3.6 3.4 2.75 3.2 2.50 -40 -20 0 20 40 60 80 100 120 140 3.0 -40 -20 0 20 40 60 80 100 120 140 Temp [C] [? ] TEMP Temp ] TEMP [? [C] Figure 17. Open Lamp Regulation Voltage Figure 18. Error Amp Output High Voltage 9 FAN7300 Typical Performance Characteristics (Continued) Output Source Current 6.0 5.5 5.0 4.5 Output Sink Current -2.0 -2.5 -3.0 -3.5 Isin [mA] Isur [mA] 4.0 3.5 3.0 -4.0 -4.5 -5.0 2.5 -5.5 2.0 -6.0 -40 -20 0 20 40 60 80 100 120 140 -40 -20 0 20 40 60 80 100 120 140 Temp [C] TEMP [? ] Temp [C] TEMP [? ] Figure 19. Output Sink Current Figure 20. Output Source Current 10 FAN7300 Mechanical Dimensions Package Dimensions in millimeters 20-SSOP 11 FAN7300 Ordering Information Product number FAN7300G Package 20-SSOP Operating Temperature -25C ~ 85C DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 4/22/03 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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